Spreader or loop-retainer for sewing-machines.



L. ONDERDONK. SPREADER OR LOOP RETAINER FOR SEWING MACHINES,

APPLICATION FILED JAN.4.1908.

Sni'zemtoz 3 SHEETS-SHEET 1.

. Patented Feb. 17, 1914.

L. ONDERDONK. V SPREADER 0R LOOP RETAINER FOR SEWING MACHINES.

I APPLI'OA-TIOg FILED JANA, 1908i 1,087,817. Patented Feb. 17-, 1914,

8 SHEETS-43111131 2.

alibi-"21 5* L'.ONDERDONKQ SPREADER 0R LOOP RETAINER'FOR SEWING MACHINES. APPLICATION FILED JAN 4. 1908.

1,087,817. Patented Feb. 17, 1914.

3 SHEETS-SHEET 3.

Snucnfoz Jvitue-ouo LANSING ONDER'D ONK, OF NEW YORK, N. ASSIGNOR TO UNION SPECIAL'MACI-IINE 00., OF CHICAGO, ILLINOIS, A. CGRPORATION OF ILLINOIS.

SFREAIDER OR LOOP-RETAINER FOR SE\VINGMACI-IINES.

eaters.

Specification of Letters Patent.

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Application filed January 4, 1908. Serial No.'4l09,288.

To all 107mm it may concern Be it known that I, LANSING Onnnnnoxn, a citizen of the United States, residing at New York city, in the county ot'New York, State of New York, have invented certain new and useful Improvements inSprezulers or Loop-Retainers for Sewing-lilachines, of which the following is a description, reference' being had to the accompanying dra\vingrand to the letters and figures of referere marked thereon.

My invention relates to spreadersor loop retainers or sewing machines, and more especially to 'a. spreader or loop retainer adapted for use in connection with a hem stitch sewing machine, such as shown and described in my application Serial Xo.

94,589, filed Feb. 18, 1902, patented June 29th, 1910, #962,973, although from certain aspects my invention is capable of use in connection with other types of machines.

In machines for making hem stitches, it is desirable at certain intervals to make two or more stitches without the teed operating to advance the fabric. In machines of this character where the second stitch is made without the feed movement, it is often diflicult to properly position the looper thread so that the needle will enter between that portion of the looper thread running from the eye of the looper to the previous enteh and the looper body as ordinarily the feed of the material cariies the looper thread back and spreads the loopcr thread loop tor the entrance of the needle.

The object of my invention is to provide aspreadcr or loop retainer which shall cooperate with the looper to hold the needle loop well back on the looper and the looper thread at one side of the looper body so that the needle may properly enter between the looper thread andthe body of the looper.

My invention consists in the parts, improvements and arrangements here1na l.ler shown. deseribed and set forth in the claims.

In the drawings which show by way of illustration one embodiment of my invention: Figure l is a front elevation of a sewing machine having my improved spreader operating mechanism applied thereto. Fig. 9 is a detail showing the spreader operating and looper operating spreader sup mrt. Fig. 5 is a sectional View through the inclined eccentric sghowing the connection of the eccentric st 'ap to the spreader support. Fig. 6 is a detail showing the main shaft with the inclined eccentric thereon. the eccentric strap being removed.-

Fig. 7 is a detail view showing the looper support and spreader support in side eleva tion. Fig. 8 is a retail view showing the loopers and the spreaders with the loopers in their extreme rearward position. Fig. 9

is a similar view with the loopers in theirextrenie forward position. Fig. 10 is a similar view showing the loopcrs having been given their lateral movement and the spreaders also moved laterally to engage the looper thread loop and to hold the same In the present illustrated embodiment of my invention, the bed plate 1 is provided with the usual work support 2,, and the overhanging arm 3 to which is pivoted a needle lever operated from the main shaft 5 by a link 6 in the usual manner. bar 7 is mounted to reciprocate ina gate 8 which by means of a link 9 may be oscillated from a suitablecam. A. second. needle bar is preferably employed which is'located in rear of the needle bar 7, and mounted to reciprocate in the gate 10 which is oscillated by a link 11 from a suitable cam. Suitable piercers are employed which operate to penetrate the fabric in advance of the stitching, and assist the stitching mechanism in making the open spaces, or what is known as hem stitching. The feeding mechanism is preferably oi the type shown in my patent above referred to and said feeding mechanism operates to advance the fabric at every third stitch.

The needle mechanism will not need turther description herein, asthe same "forms no part of the present invention.

Cooperating with the needles carried by from the looper body for the entrance of the needle.

The needle the loopers move forward into ed in a looper carrier ll which is pivoted at 15 to the usual i001 er support 16. The loopers are oscillated bythe usual link 20, which receives movement rom the needle lever through a rock lever 20 and a link QQ, which give to the loopers a lilterential nf'drement. The looper support is pivoted on two'hollow shaft bearings, one of which is shown in dotted lines 16, Fig. '7, and 'theother is shown at 16" in said figure. Thdshort hollow shaft bearing 16 is mounted in the bracket 18 and extends into the looper carrier 1'5. 'The hollow shaft 'bearing' 16" extends through the'b racket 19 and into the bracket 19. The looper carrier 16 firmly secured to said shaft bearings in any suitablemanner. he voke :ll is also secured to said shaft between the bearings 19 and 19 and engages a suitable eccentric.

.on the main shaft'5. As the main shaft 5 rotates, the "yoke 21 will be oscillated and this in turn will oscillate the hollow shaft bearing 16"and the looper carrier 16 to give to the looper its lateral or needle avoiding movement. The rod 17 is mounted within the hollowsha'fts 16 and 16", so' as to oscillate freely therein and to move longitudinally therein. with a spreader carrier 22. on which are mount-ed preaders 24;,25 which coiiperate respectively with the loopers 13 and 12. The supporting rod 17 is' oscillated and is moved longitudinally in its bearings by means of an eccentric 26, secured ,to the .main shaft 5. An eccentric strap 27, en-

circles said inclined eccentric. and 'at its outer end is connected to. a ball stud secured to a block 29 mounted on the rod, 17 and held thereon by a suitable screw 30. .Said stud 28 projects downwardly from the blocl" and it will be seen there'- for'e, that the connection between the eccentric stra) and the spreader support is at a point below the axis of said support. As the main shaft 5 rotates, the eccentric strap 2.7 will be viorated back and forth by the inclined eccentric and said vibrations of the eccentric strap 27 will give to the spreader supporting rod '17, a longitudinal movement and in turn to the spreaders, a back and forth increment. shaft rotates the eccentric strap willbe moved lopp'itudinally, due to the fact that the member 26 is set eccentrically to the shaft 5. \This longitudinal movement of. the eccentric strap will. give to the support'ng' ro '17 an oscillation and in turn a lateral increment to the spreaders relative to the loopers.

The operation of my device is as fol lows:-llhenltlie loopers are at the extreme rear end of their stroke, the Spreaders are also at the extreme rear 'of their stroke. A's

looper" thread, the, looper body and the This rod 17 is provided Also as the main forward as the looper the needle loop. tl c-sorcaders also move forward unill the points thereof are moved a short distance acresthe line of feed;v Said s.readers are also on the front'side of the needle mulloopers as viewed by the operator moved laterally to give thereto the needle aroidingv increment, the Spreaders are broiug'ht into contact vith' the looper thread running from the eye of the loopers to the previous concatenation ofthe threads. The spreaders' are at, this time also igiven a slight lateral movement and the looperv thread is crowdedl'back so that the needle will with certainty pass between the looper thread and the. looper body.' The needles as they descend, enter between the spreader fingers and the loopers. As the spreaders move across the upper face'of theloopers,

the needle loop on the loopers will also e crowded back on said loop sand properly held away from the needles as they descend,

so that the ne'edl'es-w'ill with certainty enter between the usual triangle formed by the needle loop. i

The loop spreader described above is of the special advantage v'w1hen used in con;

nection with a hem stit'clrmachine, ,where' there are idle movementsfOrthe reason th t the feed of the fabric is usually depended '95 upon to position the looper-thread and the needle'loop for theproper entrance of the needle. .My improved spreader secures the same function as the feeding of the fabric and thereforeproperly positions the looper thread and needle loop when there is no. feed movement taking'place. I. do not however, claim broadly herein the spreader operating to position the looper thread and the needle loop when no movements-take place,

as the broad invention is shown described and cla'imed'in my co-pending application above referred to.

Having thus particularly described my invention, whatI claim as-new' and desirellO to secure by LettersPatent is 1. The combination with --a needle, a looper, means for operating said needle and looper, of a spreader and an inclinedeccentrio for-giving to said'spreader a forward and back anda lateral movement, whereby the'looper thread and needle loop are properly positioned for the entrance of the needle.

, 2. The co bination' 'with a needle, a. looper and means for operatln'g the same, of

a spreader and means for operating said spreaderincluding an mchned eccentric and connections wherebysald spreader is moved and said spreader is moved laterally as the looper is moved laterally, to engage- 'the. looperv thread and properly position the and therefore, as the :looper's 'are70 is moved forward,

eaner? same for the entrance ot the needle between said looper thread and the looper body.

l 3. The combination witha needle, a

looper, a looper support and means for op- "meansfor giving said spreader a lateral movement relative to said looper, whereby said spreaderis moved into engagement withthe looper thread, to' position the same for the entrance of the needle between said looper thread and loop-er, said spreader being positioned soas to move across the path of the needle whereby the needle loop is engaged and crowded back on said looper.

4. The combination of a needle, a looper, a looper support, a spreader, a spreader supporton which said looper support is pivotally mounted, a spreader carried by said spreadeimsupport, and means for moving said, spreader and oscillating the same laterally relative to the looper, whereby the spreader is brought into engagement with the looper thread for properly positioning the same for the entrance of the needle between said threadv and the looper body, said spreader being so positioned as to move across the path of the needle, whereby the needle loop is engaged and crowded bilbli' Oll said looper.

The combination of a needle, a looper, a looper support, means for operating the same and a spreader pivoted upon the same axis as said looper support and an inclined eccentric for operating said spreader.

(5. The combination with a needle, av

looper, a looper support, means for operatinn; the same, of a spreader, a spreader support on which said looper support is pivotally mounted and an inclined eccentric for moving said spreader support longitudinall and oscillating the same.

b 7. The combination with a needle, a looper, a, looper support, a looper carrier pivoted to said looper support, of a spreader, a spreader support on which said looper support is pivoted, said spreader facing in the opposite direction, fr'on i said looper, and means for moving said spreader bodily forward and back and-for oscillating the same.

8. The combination with a needle, a looper, a looper support, a looper carrier pivoted to said looper support, of a spreader, a' spreader support on which said loo-per support" is pivoted, said spreader facing in the opposite direction from. said looper, and an inclined eccentric for ,Q'lVlliQ, said spreader a forward and backward movement and for oscillating the same.

9. A spreader mechanism including in combination a looper, and means for 'operat ing the same, a spreader support, a spreader carried thereby, a main shafthand an in:

I to which sai clined eccentric mounted on said main shaft for moving said spreader support longitudilnlly and foroscillating the same. 1.0. A spreader Ine h'a-nlsm including in combination, a spreader, a spreader support,

a main shaft, an inclined eccentric thereon, 7 0

an eccentric strap cooperating with said eccentric, a ball stud carried by said spreader su J ort and rojectin downward therefrom l' P 5 g eccentric strap is connected.

11. In a sewing machine, the combination of a needle, alooper, means tori/operating the needle and looper, aspreaddng device extending in the same general direction as the looper, and means for moving the spreading device across the longitudinal 8o axis of said looper, said spreading device be-. ing so shaped and disposed as to engage the loop of needle thread on the looper, whereby said needle loop is crowded back on the looper, and said spreading device ,being so shaped andldisposed as to engage the looper thread for holding the same away from. the; body of the looper.

' 12. In a sewing machine, the combination of a needle, a looper, HIQZlIlSfOI operating a o the needle and looper, a loop-spreading device having a curved end, means for moving said loop-spreading device across the upper face of the looper, and the outer curved face thereof into engagement with the needle loop on the looper, whereby said needle loop is crowded back on the looper, said loop spreader being so disposed relative to the looper that said spreading device engages the looper thread and separates the same from the body of the looper, and the curved end of the spreading device forms'a space for the needle to enter between the spreading device andthebody of the looper.

13. In a sewing machine, the combination of a needle, a looper, means for operating the needle and looper, a spreading device extending in the'same general direction as the looper, means for moving the spreading device across the longitudinal axis of said looper, said spreading device being so shaped and disposed as to engage the loop of needle thread on the looper, whereby said needle loop is crowded back on the looper, and said spreading device being so shaped and disposed as to engage the looper thread for holding the same away from the body of the looper, and means for ope 'ating the looper at a variable-speed relative to said' loop-spreading device.

14. The combination of a needle, a looper, means for operating said needle and looper, a spreader, a single actuating element and devices for imparting to said spreader a forward and backward and lateral movement from said actuating clement, said spreader being so disposed relative to the looper as to engage both theloope'r thread and the needle loop 'on .the looper, whereby the trio forgiving to s aidepree der a forwarzl looper thread is moved away from the body and back and a lateral movement, whereby of the looper and the needle thread loop is the needle loop is properly positioned for crowderlbeek on to the'looper and the looper the entrance of the needle.

5.thread and needle thread loop properly po- In testimony whereof I al'fix my signature, 1'5 smoned for theneedle to. pass between the I 111 presence of two wltne sses.

Same and the body or the looper. IANSING IONDERDONK 15. The combination with :1 needle, a Nitne sesz looper, means for operating sand needle and R. A. (lswlwln, 11) looner. 0 :1 spree G01, and an mchnecl ec'cen- WALTER HAnTL Y. 

